Rechargeable battery

Abstract

A rechargeable battery having excellent heat resistance, pressure resistance, and airtightness is provided by using a crimping technique to connect a metal exterior body and an electrode terminal. The rechargeable battery comprises an electrode group which includes a positive electrode and a negative electrode; an exterior container which includes an exterior canister for housing the electrode group, and a sealing plate for sealing an open part of the exterior canister; a pair of electrode terminals crimp-joined to the exterior container from inside the exterior container; and an electrolyte solution filled into the exterior container.

What is claimed is: 
     
       1. A rechargeable battery comprising:
 an electrode group including a positive electrode and a negative electrode; 
 an exterior container including a housing container for housing said electrode group; and a sealing body for sealing an open part of the housing container; 
 a pair of electrode terminals crimp-joined to said exterior container from inside said exterior container; and 
 an electrolyte solution filled into said exterior container, wherein 
 said housing container has a side wall part having a first through-hole in which said pair of electrode terminals are inserted, 
 said first through-hole has, around a peripheral edge thereof, a first folded part which is folded to inside of said housing container, 
 said electrode terminals have a second folded part which is folded from inside to outside of said housing container, and 
 said electrode terminals are crimp-joined to said housing container such that said second folded part covers said first folded part. 
 
     
     
       2. The rechargeable battery according to  claim 1 , wherein said pair of electrode terminals is provided to the same side wall part of said housing container. 
     
     
       3. The rechargeable battery according to  claim 1 , wherein at least one of said pair of electrode terminals has a metal base part having a second through-hole, said metal base part having said second folded part around a peripheral edge thereof; a metal terminal part passed through said second through-hole; and an insulation part for insulating said terminal part and said base part; and
 said base part is crimp joined to said exterior container. 
 
     
     
       4. The rechargeable battery according to  claim 1 , wherein at least one of said pair of electrode terminals has a metal base part which has said second folded part around a peripheral edge thereof, and a metal terminal part integrally molded so as to protrude at a front and back of the base part; and
 said base part is crimp joined to said exterior container. 
 
     
     
       5. The rechargeable battery according to  claim 1 , wherein
 said housing container comprises a double-sided laminate material formed by laminating both sides of a metal sheet with an insulative resin; and 
 said pair of electrode terminals has a metal base part which has said second folded part around a peripheral edge thereof, a metal terminal part integrally molded so as to protrude at a front and back of the base part, and said base part is crimp joined to said exterior container. 
 
     
     
       6. A rechargeable batter comprising:
 an electrode group including a positive electrode and a negative electrode; 
 an exterior container including a housing container for housing said electrode group and a sealing body for sealing an open part of the housing container; 
 a pair of electrode terminals crimp-joined to said exterior container from inside said exterior container; and 
 an electrolyte solution filled into said exterior container, 
 wherein 
 said pair of electrode terminals is provided to said housing container of said exterior container, 
 said housing container comprises a single-sided laminate material formed by laminating one side of a metal sheet with an insulative resin; 
 one of said electrode terminals has a metal first base part having a through-hole, a metal first terminal part passed through said through-hole, and an insulation part for insulating said first terminal part and said first base part, and said first base part is crimp-joined; and 
 the other of said electrode terminals has a metal second base part, and a metal second terminal part integrally molded so as to protrude at a front and back of the second base part, and said second base part is crimp joined to said exterior container. 
 
     
     
       7. The rechargeable battery according to  claim 5 , wherein the thickness of said metal sheet is 0.5 mm to 2 mm. 
     
     
       8. The rechargeable battery according to  claim 6 , wherein the thickness of said metal sheet is 0.5 mm to 2 mm. 
     
     
       9. The rechargeable battery according to  claim 1 , wherein
 said housing container comprises a metal sheet; and 
 said pair of electrode terminals has a metal base part having a second through-hole, said metal base part having said second folded part around a peripheral edge thereof; a metal terminal part passed through said through-hole; and an insulation part for insulating said terminal part and said base part; and said base part is crimp joined to said exterior container. 
 
     
     
       10. The rechargeable battery according to  claim 1 , wherein said crimp is a folded crimp. 
     
     
       11. The rechargeable battery according to  claim 10 , wherein the overlap during formation of said folded crimp is 50% or greater. 
     
     
       12. The rechargeable battery according to  claim 1 , wherein said housing container and said sealing body are double-seam sealed. 
     
     
       13. The rechargeable battery according to  claim 12 , wherein the overlap during said double-seam sealing is 70% or greater.